<template>
    <div :class="{ show: show }" class="header-search">
        <svg-icon class-name="search-icon" icon-class="search" @click.stop="click" />
        <el-select
            ref="headerSearchSelectRef"
            v-model="search"
            :remote-method="querySearch"
            filterable
            default-first-option
            remote
            placeholder="Search"
            class="header-search-select"
            @change="change"
        >
            <el-option
                v-for="option in options"
                :key="option.item.path"
                :value="option.item"
                :label="option.item.title.join(' > ')"
            />
        </el-select>
    </div>
</template>

<script setup lang="ts">
import Fuse from 'fuse.js';
import { getNormalPath } from '@/utils/ruoyi';
import { isHttp } from '@/utils/validate';
import usePermissionStore from '@/store/modules/permission';
import { ref, computed, onMounted, watchEffect, watch, nextTick } from 'vue';
import { useRouter } from 'vue-router';

const search = ref('');
const options = ref<any[]>([]);
const searchPool = ref<any[]>([]);
const show = ref(false);
const fuse = ref<any>(undefined);
const headerSearchSelectRef = ref<any>(null);
const router = useRouter();
const routes = computed(() => usePermissionStore().routes);

function click() {
    show.value = !show.value;
    if (show.value) {
        headerSearchSelectRef.value && headerSearchSelectRef.value.focus();
    }
}
function close() {
    headerSearchSelectRef.value && headerSearchSelectRef.value.blur();
    options.value = [];
    show.value = false;
}
function change(val: any) {
    const path = val.path;
    if (isHttp(path)) {
        // http(s):// 路径新窗口打开
        const pindex = path.indexOf('http');
        window.open(path.substr(pindex, path.length), '_blank');
    } else {
        router.push(path);
    }

    search.value = '';
    options.value = [];
    nextTick(() => {
        show.value = false;
    });
}
function initFuse(list: any) {
    fuse.value = new Fuse(list, {
        shouldSort: true,
        threshold: 0.4,
        location: 0,
        distance: 100,
        minMatchCharLength: 1,
        keys: [
            {
                name: 'title',
                weight: 0.7,
            },
            {
                name: 'path',
                weight: 0.3,
            },
        ],
    } as any);
}
// Filter out the routes that can be displayed in the sidebar
// And generate the internationalized title
function generateRoutes(routes: any[], basePath = '', prefixTitle = []) {
    let res: any[] = [];

    for (const r of routes) {
        // skip hidden router
        if (r.hidden) {
            continue;
        }
        const p = r.path.length > 0 && r.path[0] === '/' ? r.path : '/' + r.path;
        const data: any = {
            path: !isHttp(r.path) ? getNormalPath(basePath + p) : r.path,
            title: [...prefixTitle],
        };

        if (r.meta && r.meta.title) {
            data.title = [...data.title, r.meta.title];

            if (r.redirect !== 'noRedirect') {
                // only push the routes with title
                // special case: need to exclude parent router without redirect
                res.push(data);
            }
        }

        // recursive child routes
        if (r.children) {
            const tempRoutes = generateRoutes(r.children, data.path, data.title);
            if (tempRoutes.length >= 1) {
                res = [...res, ...tempRoutes];
            }
        }
    }
    return res;
}
function querySearch(query: any) {
    if (query !== '') {
        options.value = fuse.value.search(query);
    } else {
        options.value = [];
    }
}

onMounted(() => {
    searchPool.value = generateRoutes(routes.value);
});

watchEffect(() => {
    searchPool.value = generateRoutes(routes.value);
});

watch(show, value => {
    if (value) {
        document.body.addEventListener('click', close);
    } else {
        document.body.removeEventListener('click', close);
    }
});

watch(searchPool, list => {
    initFuse(list);
});
</script>

<style lang="scss" scoped>
.header-search {
    font-size: 0 !important;

    .search-icon {
        cursor: pointer;
        font-size: 18px;
        vertical-align: middle;
    }

    .header-search-select {
        font-size: 18px;
        transition: width 0.2s;
        width: 0;
        overflow: hidden;
        background: transparent;
        border-radius: 0;
        display: inline-block;
        vertical-align: middle;

        :deep(.el-input__inner) {
            border-radius: 0;
            border: 0;
            padding-left: 0;
            padding-right: 0;
            box-shadow: none !important;
            border-bottom: 1px solid #d9d9d9;
            vertical-align: middle;
        }
    }

    &.show {
        .header-search-select {
            width: 210px;
            margin-left: 10px;
        }
    }
}
</style>
